/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. See accompanying LICENSE file.
 */
package com.hortonworks.registries.auth.client;


import java.io.IOException;
import java.net.URL;

/**
 * Interface for client authentication mechanisms.
 * <p>
 * Implementations are use-once instances, they don't need to be thread safe.
 */
public interface Authenticator {

    /**
     * Sets a {@link ConnectionConfigurator} instance to use for
     * configuring connections.
     *
     * @param configurator the {@link ConnectionConfigurator} instance.
     */
    public void setConnectionConfigurator(ConnectionConfigurator configurator);

    /**
     * Authenticates against a URL and returns a {@link AuthenticatedURL.Token} to be
     * used by subsequent requests.
     *
     * @param url the URl to authenticate against.
     * @param token the authentication token being used for the user.
     *
     * @throws IOException if an IO error occurred.
     * @throws AuthenticationException if an authentication error occurred.
     */
    public void authenticate(URL url, AuthenticatedURL.Token token) throws IOException, AuthenticationException;

}
